# Bayes' calculator vs Private Notes (Nostr)

The clearest difference is ads: Bayes' calculator at none against Private Notes (Nostr)'s shown. Private Notes (Nostr)'s advantage is update cadence (fortnightly vs every 11 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Bayes' calculator ships an update every 11 months, Private Notes (Nostr) fortnightly. The most recent releases landed on October 23, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Bayes' calculator | Private Notes (Nostr) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/bayes-calculator/id1639652828/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 1 MB | 33 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Rosenblum](https://appshunter.io/developer/1639652830) | [alexey popkov](https://appshunter.io/developer/1500909659) |

## What reviewers say

### Bayes' calculator

[App page](https://appshunter.io/ios/app/bayes-calculator/id1639652828)

This application provides a straightforward tool for performing calculations based on Bayes' Theorem. It is designed for users who need to apply this statistical concept in their work or studies. The app offers a simple interface for inputting probabilities and obtaining results.

**Highlights:** Bayes' Theorem calculations, Probability input, Result display, Simple interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Private Notes (Nostr)

[App page](https://appshunter.io/ios/app/private-notes-nostr/id6757975921)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Bayes' calculator free?

Bayes' calculator is free to download, with no in-app purchases.

### Is Private Notes (Nostr) free?

Private Notes (Nostr) is free to download, with no in-app purchases.

### Do Bayes' calculator or Private Notes (Nostr) have ads?

Private Notes (Nostr) shows ads; Bayes' calculator does not.

### Which is updated more often, Bayes' calculator or Private Notes (Nostr)?

Bayes' calculator ships an update every 11 months, and Private Notes (Nostr) fortnightly. Most recently, Bayes' calculator was updated on October 23, 2026 and Private Notes (Nostr) on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*